// C++N4741 Committee Draft, Standard for Programming Language C++
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/n741.pdf
const char* msg= "C++N4741(269)23.17.5 Class template duration [time.duration]p661.cpp";
// Edited by Dr. Ogawa Kiyoshi. Compile procedure and results record.

#include <iostream>
#include <cstdlib>
#include <chrono>

using namespace std;
using namespace std::chrono;

duration<long, ratio<60>> d0; // holds a count of minutes using a long
duration<long long, milli> d1; // holds a count of milliseconds using a long long
duration<double, ratio<1, 30>> d2; // holds a count with a tick period of 1/30 of a second
// (30 Hz) using a double

int main() {
//  http://ja.cppreference.com/w/cpp/chrono/duration
  cout << std::chrono::duration_cast<std::chrono::minutes>(d0).count()<<endl;
  cout << std::chrono::duration_cast<std::chrono::milliseconds>(d1).count()<<endl;
  cout << std::chrono::duration_cast<std::chrono::duration<double, ratio<1, 30>>>(d2).count()<<endl;
  cout << msg << endl;
  return EXIT_SUCCESS;
}

$ ../cpla.sh p661
$ clang++ p661.cpp -std=c++03 -Wall
p661.cpp:13:24: warning: use of right-shift operator ('>>') in template argument will
      require parentheses in C++11 [-Wc++11-compat]
duration<long, ratio<60>> d0; // holds a count of minutes using a long
                       ^
p661.cpp:13:27: error: use of undeclared identifier 'd0'
duration<long, ratio<60>> d0; // holds a count of minutes using a long
                          ^
p661.cpp:13:29: error: expected a type
duration<long, ratio<60>> d0; // holds a count of minutes using a long
                            ^
p661.cpp:15:29: warning: use of right-shift operator ('>>') in template argument will
      require parentheses in C++11 [-Wc++11-compat]
duration<double, ratio<1, 30>> d2; // holds a count with a tick period of 1/30 of a second
                            ^
p661.cpp:15:32: error: use of undeclared identifier 'd2'
duration<double, ratio<1, 30>> d2; // holds a count with a tick period of 1/30 of a second
                               ^
p661.cpp:15:34: error: expected a type
duration<double, ratio<1, 30>> d2; // holds a count with a tick period of 1/30 of a second
                                 ^
p661.cpp:20:59: error: use of undeclared identifier 'd0'
 cout << std::chrono::duration_cast<std::chrono::minutes>(d0).count()<<endl;
                                                          ^
p661.cpp:22:80: error: expected expression
 cout << std::chrono::duration_cast<std::chrono::duration<double, ratio<1, 30>>>(d2)....
                                                                               ^
p661.cpp:22:81: error: expected a type
 cout << std::chrono::duration_cast<std::chrono::duration<double, ratio<1, 30>>>(d2)....
                                                                                ^
p661.cpp:22:82: error: type-id cannot have a name
 cout << std::chrono::duration_cast<std::chrono::duration<double, ratio<1, 30>>>(d2).count...
                                                                                 ^~
p661.cpp:22:99: error: expected a type
  ...ratio<1, 30>>>(d2).count()<<endl;
                                     ^
2 warnings and 9 errors generated.
$ clang++ p661.cpp -std=c++2a -Wall
0
0
0
C++N4741(269)23.17.5 Class template duration [time.duration]p661.cpp

$ g++-8 p661.cpp -std=c++03  -Wall
In file included from /usr/local/Cellar/gcc/8.1.0/include/c++/8.1.0/chrono:35,
                 from p661.cpp:8:
/usr/local/Cellar/gcc/8.1.0/include/c++/8.1.0/bits/c++0x_warning.h:32:2: error: #error This file requires compiler and library support for the ISO C++ 2011 standard. This support must be enabled with the -std=c++11 or -std=gnu++11 compiler options.
 #error This file requires compiler and library support \
  ^~~~~
p661.cpp:11:22: error: 'chrono' is not a namespace-name
 using namespace std::chrono;
                      ^~~~~~
p661.cpp:11:28: error: expected namespace-name before ';' token
 using namespace std::chrono;
                            ^
p661.cpp:13:1: error: 'duration' does not name a type; did you mean 'daemon'?
 duration<long, ratio<60>> d0; // holds a count of minutes using a long
 ^~~~~~~~
 daemon
p661.cpp:14:1: error: 'duration' does not name a type; did you mean 'daemon'?
 duration<long long, milli> d1; // holds a count of milliseconds using a long long
 ^~~~~~~~
 daemon
p661.cpp:15:1: error: 'duration' does not name a type; did you mean 'daemon'?
 duration<double, ratio<1, 30>> d2; // holds a count with a tick period of 1/30 of a second
 ^~~~~~~~
 daemon
p661.cpp: In function 'int main()':
p661.cpp:20:15: error: 'std::chrono' has not been declared
  cout << std::chrono::duration_cast<std::chrono::minutes>(d0).count()<<endl;
               ^~~~~~
p661.cpp:20:42: error: 'std::chrono' has not been declared
  cout << std::chrono::duration_cast<std::chrono::minutes>(d0).count()<<endl;
                                          ^~~~~~
p661.cpp:20:59: error: 'd0' was not declared in this scope
  cout << std::chrono::duration_cast<std::chrono::minutes>(d0).count()<<endl;
                                                           ^~
p661.cpp:21:15: error: 'std::chrono' has not been declared
  cout << std::chrono::duration_cast<std::chrono::milliseconds>(d1).count()<<endl;
               ^~~~~~
p661.cpp:21:42: error: 'std::chrono' has not been declared
  cout << std::chrono::duration_cast<std::chrono::milliseconds>(d1).count()<<endl;
                                          ^~~~~~
p661.cpp:21:64: error: 'd1' was not declared in this scope
  cout << std::chrono::duration_cast<std::chrono::milliseconds>(d1).count()<<endl;
                                                                ^~
p661.cpp:22:15: error: 'std::chrono' has not been declared
  cout << std::chrono::duration_cast<std::chrono::duration<double, ratio<1, 30>>>(d2).count()<<endl;
               ^~~~~~
p661.cpp:22:42: error: 'std::chrono' has not been declared
  cout << std::chrono::duration_cast<std::chrono::duration<double, ratio<1, 30>>>(d2).count()<<endl;
                                          ^~~~~~
p661.cpp:22:59: error: expected primary-expression before 'double'
  cout << std::chrono::duration_cast<std::chrono::duration<double, ratio<1, 30>>>(d2).count()<<endl;
                                                           ^~~~~~

$ g++-8 p661.cpp -std=c++2a  -Wall
0
0
0
C++N4741(269)23.17.5 Class template duration [time.duration]p661.cpp